Story highlights

The magnitude-7.8 earthquake struck Saturday night

A state of emergency has been declared in six provinces

(CNN)Rescue workers are still searching for an unknown number of people trapped in debris following Ecuador's biggest earthquake in decades. The death toll has risen to more than 650 and thousands are injured, Ecuadorian officials said last week.

The military has brought in search dogs to help find survivors and bodies and 10,000 soldiers have been deployed. They've set up mobile hospitals and temporary shelters.

Here's how you can help with donations.

The Ecuador Red Cross has teams on the ground providing first aid and searching for survivors.

UNICEF has delivered 20,000 water purification tables to the area worst affected by the quake. UNICEF is also assessing the needs of children in the earthquake zone.

Read More

World Vision has deployed an emergency response staff to assist with aid distributions and is setting up shelters.

Samaritan's Purse personnel are on the ground to help coordinate with churches and community officials. The groups says field hospital and medical staff will be arriving later this week.

World Food Program is providing food assistance to more than 5,000 families affected by the earthquake.

Handicap International and their emergency specialists are on the ground in Ecuador. They are providing rehabilitation services and counseling for the injured and their families.

AmeriCares is on the ground in Ecuador and providing medical aid and supplies.

The American Jewish Joint Distribution Committee (JDC) and its partners are providing aid to hundreds of people, including food, water, medical equipment and supplies, water filters and purification tablets, solar panel lamps, and post-trauma kits for children.

Impact Your World is monitoring the situation after the 7.8-magnitude quake struck on the country's central coast.